Question

Rezolvati ecuatiile: b) 2 (×+28)=112; c) 4 (7+5×)=248+2×

Answer 1

2(x+28)=112⇒2x+56=112⇒2x=112-56⇒2x=56⇒x=56/2⇒x=28
4(7+5x)=248+2x⇒28+20x=248+2x⇒20x-2x=-248+28⇒18x=-220⇒x=-220/18⇒x=12.(2)
succes

Answer 2

b)2(x+28)=112
2x+56=112
2x=112-56
2x=56
x=56:2
x=28

c)4(7+5x)=248+2x
28+20x=248+2x
20x=248-28+2x
20x=220+2x
18x=220